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Rapid algorithm for system fault tree bottom event structure importance

A technology of system failure and event structure, applied in the direction of calculation, response error generation, instruments, etc., can solve the problems of slow and inaccurate calculation speed, and achieve the effect of improving the calculation speed

Active Publication Date: 2021-03-30
CNOOC TIANJIN BRANCH +1
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Problems solved by technology

[0003] In view of this, the present invention proposes a fast algorithm for the importance of event structure at the bottom of the system fault tree to solve the problems of slow and inaccurate calculation in the prior art

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  • Rapid algorithm for system fault tree bottom event structure importance
  • Rapid algorithm for system fault tree bottom event structure importance
  • Rapid algorithm for system fault tree bottom event structure importance

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Embodiment Construction

[0018] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings and examples.

[0019] In the present invention, "top event" refers to the topmost event in the fault tree model, and is also an accident to be analyzed by constructing the fault tree model, such as motor system failure / fault, XX equipment failure / fault.

[0020] In the present invention, "system" refers to a set of cooperating devices or components and functional blocks used to realize a production or control in the production process.

[0021] This embodiment provides a fast algorithm for the structural importance of events at the bottom of the system fault tree, such as Figure 1A shown, including steps:

[0022] S1, constructing the fault tree bottom event model of the system;

[0023] S2, obtain the event model at the bottom of the fault tree, obtain the minimum cut set of the event at the bottom of the fault tree and the structural ex...

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Abstract

The invention provides a rapid algorithm for the importance degree of a system fault tree bottom event structure. The rapid algorithm comprises the steps: constructing a fault tree bottom event modelof a system; obtaining a fault tree bottom event model, and obtaining a minimum cut set of fault tree bottom events and a structural expression F(X) of top events through a Boolean algebra simplification method, wherein the minimum cut set comprises a single event cut set and a multi-event cut set; performing calculating to obtain a bottom event structure importance degree of the single event cutset and a bottom event structure importance degree of the multi-event cut set; and performing ascending or descending sorting on all the obtained structure importance degrees according to the size. Structural importance priority ranking of all bottom events can be obtained through calculation results, and a basis is provided for strategy making for avoiding top events.

Description

technical field [0001] The invention relates to a fast algorithm for the importance degree of event structure at the bottom of a system fault tree, and belongs to the technical field of system reliability analysis. Background technique [0002] Fault tree analysis is mainly used in the fields of safety engineering, reliability engineering, and software engineering to understand the main causes of equipment or system failures and find the best way to reduce risks. Structural importance analysis is to analyze the importance of each bottom event from the fault tree structure. By calculating the structural importance of the bottom event and clarifying the priority of importance, it is possible to further understand the components or components that are more likely to fail in the equipment or system that needs to be evaluated for risk. Components that lead to more serious consequences after failure. At present, there are generally two methods for structural importance analysis: ...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F11/07
CPCG06F30/20G06F11/079
Inventor 倪先锋张雷欧阳俊郝富强陶维张忠容慧娴
Owner CNOOC TIANJIN BRANCH
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